Three 1000 W 80 PLUS Gold-Certified Power Supplies Tested

Conclusion And Comparison Table

We had high expectations of these three tested PSUs. The lofty power ratings and 80 PLUS Gold certifications promised some genuine highlights and the devices did not disappoint when it came to high power output, which is what these devices were designed for in the first place. Unfortunately we did not receive a lot of information on the individual peak power for each 12 V rail from the PSU vendors, hence we have to stick to the plain summary that you’ll get a combined 1000 W across four to six individual 12 V rails.

However, our tests mostly highlighted some weaknesses that should not exist at the highest end. None of the three PSUs actually managed to fully live up to the 80 PLUS Gold standards. The OCZ PSU slipped up a bit in the ripple/noise measurement, Sparkle's build quality undermined its solution a bit, and the Rosewill PSU suffered from impacted energy efficiency at low loads. The bottom line is a bit disappointing, given the high price points in excess of $200, with the OCZ Z1000M scoring best.

Comparison Table